I just visited NYC and did some tea shopping, referring to this thread and some online sources for options, in general agreeing with the comments here about options I did check out:http://teaintheancientworld.blogspot.co ... -city.html
The post rambles on so much I couldn't add to what it expresses, but I can offer some summary here, a shorter version.
The emphasis in this forum would be on the best of the best teas, and I didn't do pursuit of those justice, I just saw what I saw in a limited area around Chinatown. Places like Ten Ren and New Kam Man Chinese market weren't worth checking out, unless gambling on value oriented modest offerings is of interest.
I did like Sun's Organic Garden, but it's not normally how I buy tea to see them labeled as a type, without more about a specific source. I'm more into how tea aspects go than such details, and I only tried one of four I bought there, a modest Kenyan black tea. It was nice, so maybe that approach does work out in this case.
I missed more than I made it to due to only being in NYC for a few days (four whole days, maybe it was, but my family vacations aren't focused on the tea theme), with some on research of what I missed in the post. Further reviews will clarify how it went in terms of results more but at least it was interesting.